My car is pinging like crazy (70 mustang 302)...i changed the manifold and carb gaskets this weekend thinking it might be a vacuum leak but it didn't help. The timing is at 10 degrees btc. The car releases some white smoke and the pinging gets worse as it gets hotter...any suggestions? Could it be a carb problem? (Holley 4bbl) A distributor problem? (MSD-6A with heavy springs)? i'm going crazy!!!!